NDLI: Comprehensive Analysis of Monomeric Phenolics in Dilute Acid Plant Hydrolysates

Content Provider	Springer Nature Link
Author	Mitchell, Valerie D. Taylor, Caroline M. Bauer, Stefan
Copyright Year	2013
Abstract	We carried out a comprehensive analysis of the phenolic compounds in hydrolysate produced by dilute acid pretreatment of 20 potential lignocellulosic biofuel feedstocks, including grasses, hardwoods and softwood, and agaves. We find that the phenolic fraction is dominated by Hibbert's ketones, most of which had not so far been characterized in hydrolysate. Using gas chromatography/mass spectrometry, a range of 43–68 monomeric phenolic compounds were identified in each of the feedstocks, including from 13 to 20 Hibbert's ketones and related structures, which represented 28–82 % of phenolics formed during pretreatment. The total concentration of phenolics ranged from 87 to 1,077 μg/mL (equivalent to 78–969 mg phenolics released per 100 g of biomass used) across the feedstocks studied. While total amount of phenolics produced does not correlate with the Klason lignin in the feedstock, the distribution of compound types produced is reflective of the S and G monolignol ratios of the feedstock. Since phenolic compounds are particularly inhibitory to microbial processes and cellulolytic enzymes, our results indicate there is sufficient variation across feedstocks that design strategies are likely to benefit from both general and targeted approaches to detoxification.
Starting Page	654
Ending Page	669
Page Count	16
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	7
Issue Number	2
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2013-11-26
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phenolics Inhibitors Pretreatment Dilute acid GC/MS Biomass Biofuels Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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